Method and device for measuring interference in communication system
View Patent ↗A method and a device for measuring interference in a communication system are provided. The method includes measuring interference in a base station of a communication system, in which one or more antenna groups are arranged at different positions in a single cell, includes the steps of determining a reception antenna group which is one of the one or more antenna groups that transmits a signal other than an interference signal to a terminal, determining a reference signal in order to measure the strength of the signal transmitted by the reception antenna group, a step of determining a wireless resource so as to measure the interference in each of the one or more antenna groups, and notifying the terminal with the strength of the signal transmitted by the reception antenna group and information for measuring the interference in each of the one or more antenna groups.
1. A method for performing interference measurement in an enhanced Node B (eNB) of a communication system in which at least one remote radio head (RRH) group is arranged in distributed locations within a single cell, the method comprising:
determining a reception RRH group for transmitting a signal other than an interference signal to a user equipment (UE) among the at least one RRH group;
determining a reference signal for measuring a strength of the signal transmitted by the reception RRH group;
determining a wireless resource for measuring interference for each of the at least one RRH group; and
notifying the UE of the strength of the signal transmitted by the reception RRH group and information for interference measurement for each of the at least one RRH group,
wherein the notified information for interference measurement includes time information of the wireless resource for measuring interference and the time information is defined by a number of interference measurement resources (IMR) included in N subframes.
2. The method of claim 1 , wherein the reference signal includes a CSI-RS (Channel Status Information Reference Signal).
3. The method of claim 1 , wherein the determining of the reference signal includes determining a single reference signal with respect to the reception RRH group.
4. The method of claim 1 , wherein the wireless resource includes a reference signal transmitted by an RRH group adjacent to the reception RRH group among the at least one RRH group, or a predetermined muting pattern.
5. The method of claim 1 , wherein the notifying includes notifying the UE of the strength of the signal transmitted by the reception RRH group and the information for interference measurement for each of the at least one RRH group, using higher layer signaling.
6. A method for performing interference measurement in a user equipment (UE) of a communication system in which at least one remote radio head (RRH) group is arranged in distributed locations within a single cell, the method comprising:
receiving, from an enhanced Node B (eNB), a strength of a signal transmitted by a reception RRH group for transmitting a signal other than an interference signal to the UE among the at least one RRH group and information for interference measurement for the at least one RRH group;
measuring, when it is determined that a resource for interference measurement is allocated by checking the received information for interference measurement, interference using the allocated resource for interference measurement;
receiving a reference signal from the reception RRH group, and generating channel status information using an amount of the measured interference; and
transmitting the channel status information to the eNB,
wherein the received information for interference measurement includes time information of a wireless resource for measuring interference and the time information is defined by a number of interference measurement resource (IMIR) included in N subframes.
7. The method of claim 6 , wherein the measuring of the interference further includes measuring, when it is determined that the resource for interference measurement is not allocated by checking the received information for interference measurement, the interference using a CRS (Cell specific Reference Signal).
8. The method of claim 6 , wherein the received information includes at least one of a channel status information-reference signal (CSI-RS) measurement set, an interference measurement set, and channel status information feedback-related information.
9. The method of claim 6 , wherein the resource for interference measurement includes a channel status information-reference signal (CSI-RS) allocated to an RRH group adjacent to the reception RRH group among the at least one RRH group, or a predetermined muting pattern.
10. The method of claim 6 , wherein the receiving includes receiving the strength of the signal and the information for interference measurement, through higher layer signaling.
11. An enhanced Node B (eNB) of a communication system in which at least one remote radio head (RRH) group is arranged in distributed locations within a single cell, the eNB comprising:
a receiver configured to receive a signal from a user equipment (UE;
a transmitter configured to transmit a signal to the UE; and
a processor configured to:
determine a reception RRH group for transmitting a signal other than an interference signal to the UE among the at least one RRH group;
determine a reference signal for measuring a strength of the signal transmitted by the reception RRH group;
determine a wireless resource for measuring interference for each of the at least one RRH group; and
notify the UE of the strength of the signal transmitted by the reception RRH group and information for interference measurement for each of the at least one RRH group,
wherein the notified information for interference measurement includes time information of the wireless resource for measuring interference and the time information is defined by a number of interference measurement resources (IMR) included in N subframes.
12. The eNB of claim 11 , wherein the reference signal includes a channel status information-reference signal (CSI-RS).
13. The eNB of claim 11 , wherein the processor is further configured to determine a single reference signal with respect to the reception RRH group.
14. The eNB of claim 11 , wherein the wireless resource includes a reference signal transmitted by an RRH group adjacent to the reception RRH group among the at least one RRH group, or a predetermined muting pattern.
15. The eNB of claim 11 , wherein the processor is further configured to notify the UE of the strength of the signal transmitted by the reception RRH group and the information for interference measurement for each of the at least one RRH group, using higher layer signaling.
16. A user equipment (UE) of a communication system in which at least one remote radio head (RRH) group is arranged in distributed locations within a single cell, the UE comprising:
a receiver configured to receive a signal from an enhanced Node B (eNB);
a transmitter configured to transmit the signal to the eNB; and
a processor configured to:
receive, from the eNB, a strength of a signal transmitted by a reception RRH group for transmitting a signal other than an interference signal to the UE among the at least one RRH group and information for interference measurement for the at least one RRH group;
measure, when it is determined that a resource for interference measurement is allocated by checking the received information for interference measurement, interference using the allocated resource for interference measurement;
receive a reference signal from the reception RRH group and generate channel status information using an amount of the measured interference; and
transmit the channel status information to the eNB,
wherein the received information for interference measurement includes time information of a wireless resource for measuring interference and the time information is defined by a number of interference measurement resource (IMR) included in N subframes.
17. The UE of claim 16 , wherein the processor is further configured to measure, when it is determined that the resource for interference measurement is not allocated by checking the received information for interference measurement, the interference using a CRS.
18. The UE of claim 16 , wherein the received information includes at least one of a channel status information-reference signal (CSI-RS) measurement set, an interference measurement set, and channel status information feedback-related information.
19. The UE of claim 16 , wherein the resource for interference measurement includes a channel status information-reference signal (CSI-RS) allocated to an RRH group adjacent to the reception RRH group among the at least one RRH group, or a predetermined muting pattern.
20. The UE of claim 16 , wherein the processor is further configured to receive the strength of the signal and the information for interference measurement, through higher layer signaling.